ay, we are having fun with it at brize.
beside the fact that it doesnt recognise shift workers and weekends without some messing around, and the fact that it slows to a crawl during the day, the other main problem we have is the admin staff who have been trained on the internals of jpa are all leaving or are still away on courses, thus leaving us workers in the lurch.
Our process at the moment is to just fill in paper leave passes then let the flight spend the rest of the night trying to organise it while we get on with work.